9. Deice Control
• Deicing operation is controlled by timer and sensing the indoor pipe temperature.
• Deicing operation checks the indoor pipe temperature and Intake-air temperature at 25 minutes and 60 minutes
on starting of heating operation, and discriminates by temperature difference.
• When the heating operation passed 25 minutes, the temperature (△T1=TE1–TR1) is checked and memorized
with checking the indoor pipe temperture (TE1) and the indoor Intake-air temperature (TR1).
• When the heating operation passed 60 minutes, deicing operation checks the indoor pipe temperature (TE2)
and the indoor Intake-air temperature (TR2), and checks indoor pipe temperature(TE2), the temperature
difference (△T2=TE2–TR2) and the temperature difference △Td(=△T1–△T2) of △T1, △T2.
If temperature of indoor pipe is below 32°C Deicing function operates at the priority I condition.
If temperature of indoor pipe is over 32°C Deicing function operates at the priority II condition.
If the temperature difference (△Td) become more than the option temperature, deicing operation starts.
• At that time, deicing operation time is decided.
• The deicing operation time starts after deicing operation started.
• If deicing operation start, above heating operation time is reset, so if deicing operation is finished, the heating
operation time is recounted.
• The deicinig time and the operation diagram are as following.
T1- T2 Td Over 6°C 5~6°C 4~5°C 3~4°C below 2.0°C
Deicing Time 10mins 9mins 8mins 7mins Heating Operation
TE2 Below 30°C 30~31°C 31~32°C Over 32°C
Deicing Time 12mins 11mins 10mins Heating Operation
(DEICING DIAGRAM)
Priority I
Priority II